i think it's doubtful that 2-ai is methylated in vivo. demethylation reactions are much more common.
for instance, amphetamine is not methylated to methamphetamine. instead the reverse happens
2C-x drugs, DOx drugs, and tryptamines, the same. AMT and NMT (even plain tryptamine) are not methylated either
if anything these are demethylated
more than likely MAO will degrade it to the inactive ketone if it is a bare primary amine